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2 Commits

Author SHA1 Message Date
MrKevinWeiss
e0fdc3c16c
*Kconfig*: Modify Kconfig to remove dep model 2024-03-27 10:28:12 +01:00
Benjamin Valentin
669104d841 cpu/sam0_common: SPI: don't perform DMA transfer for small buffers
Setting up a DMA transfer can take longer than sending out a buffer
byte by byte if the buffer is small.

DMA only shows advantages for large buffers, using it for every transfer
will cause a net slowdown.

Since we did not come up with a good way to determine the treshold based
on the SPI frequency, just use a fixed buffer for now so that DMA can be
used without slowing things down overall.
2021-11-19 17:22:51 +01:00